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A Rational Approach to Determine Minimum Strength Thresholds in Novel Structural Materials (2003)

Author: Schur, Willi W.; Bilen, Canan; Sterling, Jerr
Subject: GENETIC ALGORITHMS; MATHEMATICAL MODELS; OPTIMIZATION; OPERATORS (MATHEMATICS); CONVERGENCE; VECTOR ANALYSIS; STOCHASTIC PROCESSES
Year: 2003
Language: English
Book contributor: NASA
Collection: nasa_techdocs

Description

Design of safe and survivable structures requires the availability of guaranteed minimum strength thresholds for structural materials to enable a meaningful comparison of strength requirement and available strength. This paper develops a procedure for determining such a threshold with a desired degree of confidence, for structural materials with none or minimal industrial experience. The problem arose in attempting to use a new, highly weight-efficient structural load tendon material to achieve a lightweight super-pressure balloon. The developed procedure applies to lineal (one dimensional) structural elements. One important aspect of the formulation is that it extrapolates to expected probability distributions for long length specimen samples from some hypothesized probability distribution that has been obtained from a shorter length specimen sample. The use of the developed procedure is illustrated using both real and simulated data.

Creative Commons license: Public Domain

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Identifier:	nasa_techdoc_20040035837
Document-source:	CASI
Documentid:	20040035837
Nasa-center:	Goddard Space Flight Center; Wallops Flight Facility
Online-source:	http://wayback.archive-it.org/1792/20100214045716/http://hdl.handle.net/2060/20040035837
Original-nasa-rights:	Unclassified; No Copyright; Unlimited; Publicly available;
Report-number:	A-0311046/PT2; NASA/TM-2003-212813/PT2
Updated-added-to-ntrs:	2005-10-13
Licenseurl:	http://creativecommons.org/licenses/publicdomain/
Mediatype:	texts
Rights:	Public Domain
Identifier-access:	http://www.archive.org/details/nasa_techdoc_20040035837
Identifier-ark:	ark:/13960/t77s8kj8x
Ppi:	300
Ocr:	ABBYY FineReader 8.0